| 摘要 |
A sturdy mount is provided between a valve body bonnet (38) and a actuator frame (21) to reduce the transfer of heat from a valve body (39) to a actuator frame (21). Holes (18) in legs (28 a b c) reduce heat transfer through legs (28 a b c). Heat shield (27) blocks radiant heat from a hot valve body from reaching the actuator frame (21) and also acts as a radiator of heat to the surrounding air. Bolt (30) is free to move through bushing (26) located in the center of heat shield (27). Jamb nut (24) and spring plate (23) am screwed on to the threaded end of bolt (30). Legs (28 a b c) are attached to heat shield (27) with welds (19) on one edge to allow legs (28 a b c) to be spread slightly when installing on valve body bonnet (38). Slots (17) in legs (28 ) snap in place around valve body bonnet (38) Hose clamp (29) pulls legs (28 a b c) tightly to the valve body bonnet (38) creating a sturdy mount for heat shield (27) and attached actuator mount (25). A actuator frame (21) is installed on actuator mount (25) with a set screw (22) The force of the piston located in actuator frame (21) on a application of air pressure to the actuator frame (21) presses down on spring plate (23) that is connected to the threaded end of bolt (30). The head of bolt (30) presses down on a valve stem (35) compressing a spring (37) closing off the fluid flowing through the valve body. Upon a release of air pressure from the actuator (21) Spring (37) pushes valve stem (35) up against the head of bolt (30) which spring plate (23) is attached. Spring plate (23) pushes up against the piston that is located in the actuator frame (21) returning it to its normal position and allowing fluid to flow through the valve body.
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